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Fracturing fluid composition and method utilizing same

a technology of fluid composition and fracture fluid, which is applied in the field of fluid composition composition, can solve the problems of reducing the permeability of hydrocarbons, reducing the productivity of wells, and affecting productivity

Active Publication Date: 2017-03-16
PRAXAIR TECH INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patent text describes a fracturing fluid composition that includes carbon dioxide and a friction-reducing polymer. The friction-reducing polymer is made up of at least fluoroacrylate monomers and has a high molecular weight. It is designed to reduce friction in the fluid and make it easier to pump. The amount of friction-reducing polymer in the fluid is important, with 0.001 to 0.4 weight percent being typical. The combination of carbon dioxide and friction-reducing polymer improves the efficiency of the fracturing process.

Problems solved by technology

When exposed to aqueous based fluids, formations can trap water for long periods of time, which can result in reduced permeability to hydrocarbons and reduced productivity of the well.
Additionally, some clays in the formation can swell in the presence of water or migrate through the formation resulting in closing off or blocking of porosity, again resulting in productivity impairment.
Therefore, a reduction in the amount of water introduced into a well can result in decreased formation damage.
Moreover, the availability of water for hydraulic fracturing may also be limited in certain geographies of interest for oil and gas production, thereby presenting an economic or regulatory barrier to practical recovery of these resources.

Method used

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  • Fracturing fluid composition and method utilizing same
  • Fracturing fluid composition and method utilizing same
  • Fracturing fluid composition and method utilizing same

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0026]The first experimental set-up and procedure is described in more detail with reference to FIG. 1 and Table 1, as follows:

[0027]The test apparatus comprised two Teledyne Isco model 500HP syringe pumps, 100 and 200, connected in fluid communication via two alternate paths: (i) a path containing a coiled, six foot length of one-sixteenth inch stainless steel tubing 150, having an inner diameter of 0.022 inches, and (ii) a path comprising quarter-inch tubing containing a 100 cc view-cell 160. The coiled section was designed to impart significant pressure drop on the flowing fluid, while the view-cell enabled visual inspection and preloading of polymer samples into the system.

[0028]The two pumps were controlled via Teledyne Isco control box 170 and were operated in such a way that fluid could be pumped from one pump to the other through coil 150 or view-cell 160 in one pass, and back again in a second pass, etc. The supplying pump (100 or 200, depending on the phase) was set up to ...

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Abstract

The present disclosure is directed to a composition and method of fracturing a formation penetrated by a well-bore. The composition and method comprises providing a fracturing fluid that is carbon dioxide (CO2) with at least one friction reducing polymer that is a fluoropolymer dissolved in the CO2 at a concentration of about 0.001 to 0.4 weight percent.

Description

CROSS REFERENCE TO RELATED APPLICATION[0001]This application claims the benefit of U.S. Provisional Application Ser. No. 62 / 217,103, filed on Sep. 11, 2015, which is incorporated herein by reference.FIELD OF THE INVENTION[0002]The present disclosure relates to the composition of a fluid comprising liquid carbon dioxide and a friction reducing polymer that is a fluoropolymer for the use of fracturing a subterranean formation.BACKGROUND AND RELATED ART[0003]Hydraulic fracturing is a common stimulation technique used to enhance production of oil and gas from hydrocarbon containing reservoirs. In a typical hydraulic fracturing operation, a fracturing fluid is pumped at high pressures and high rates through a wellbore penetrating a subterranean formation to initiate and propagate hydraulic fractures in the formation. Subsequent steps typically include adding particulate matter known as proppant to the fracturing fluid (e.g., graded sand, ceramic particles, bauxite, or resin coated sand) ...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): C09K8/62
CPCC09K2208/28C09K8/62E21B43/26C09K8/88C09K8/94
Inventor SCHARMACH, WILLIAM J.KELLY, RICHARD M.
Owner PRAXAIR TECH INC